... to generate aldehyde 5b in good yield (Entry 2). Gratifyingly, oxidation of complex organic molecules was ... Further oxidation(15) of the crude aldehyde delivered tris-ethyl ester 11 in high yield whereas ... then BnNH 2 , TMSCN, THF, 23 °C; (d) nitrite-Wacker then Ph 3 P═CHCO 2 ...